i am not sure how to describe it, its similar to a clicking sound and it only happen once when the computer is turning off, i never hear it when the computer is turning on or if it has been on for a while only when the computer switches off is this normal my psu is EVGA 650W P2 and it is about 3 days old i got sent it from evga as i had to rma the last one so i am hoping this is normal, anyone else experienced this?